Apparatus for temporarily rendering secondary representations visible on a transparent primary representation



prnl 22, 1941. c. BECKER APPARATUS FOR TEMPORARILY RENDERING SECONDARY REPRESENTATIONS VISIBLE ON A TRANSPARENT PRIMARY REPRESENTATION Filed Oct. 27, 1938 representation.

Patented Apr. 22, 1941 APPARATUS FOR TEMPORARIL' RENDER- ING SECONDARY REPRESENTATIONS VIS- RESENTATION IBLE ON A TRANSPARENT PRIMARY REP- Charles Becker, Strasbourg, France Applicata@ october 27, 1933,seria1`noy2aa2s4 "In France January 19, 1938 (Cl. h-'40) 3 Claims.

The secondary representations can 'be rendered -1 visible in the transparent'primary krepresentation by portions that are cut out of a cover put between the primary representation andsaid slide and which cover has the same color as the surface of the slide. K the slide is the carrier of the finished secondary representation and purpose of thev cover is only to cover up the secondary representations or to render them visible in the transparent primary It is an object of the present invention to provide an apparatus of the type set forth by means of which secondary representations can be made visible at every portion of the Whole surface of a primary representation without, as hitherto, the slide having to be larger than the primary representation. Furthermore with the apparatus .according to the present invention the configuration of the secondary representations can be changed.

According to the invention the secondary .representations are not in nished condition `on the slide as hitherto, but Ythey are partly on a slide and partly on a cover so that the secondary representations are formed conjointly by the slide. and cover which are movable relative to one another. According to the invention the cover is also used for the formation of the secondary representations, whereas hitherto it only had the function of covering up secondary representations and rendering them visible in part in the transparent primary representation. In the apparatus according to the invention, one or more movable covers is or are employed, all these covers being characterised by the feature that they contain fractional representations the cooperation of Which results in the formation of secondary representations visible in the primary representation.

Consequently in these cases L Various embodiments of the invention are shownfin the accompanying drawing, in which Fig. 1 isa top viewof an apparatus according to the present invention,

1iig..2lis a cross sectionalview taken along line 2,-2 in Fig. 1,

Fig. 3 is atop View of a modified apparatus according to the .present invention, n

Fig. 4 is a cross sectional view taken along line ll---iiinliigI H l Fig. 5 is a top View of another modilication of the present invention, Fig. 6 is a sectional View taken along line 6-5 inFig..5, Y

Fig. 7 is a partial top View on an enlarged scale of a further modification of the present invention, l

Fig. 8 is a cross sectional view of a still further modified embodiment of the present invention.

yReferring more particularly to the embodiment of the present .invention according to`Figs. l and 2 the cover sheet b is slideably movable Within a casing S having a transparent top a. A colored triangle g is put on'the slide d which slide is also slideably disposed within casing a and underneath. sheet'b.` A transparent triangle h is provided in the covering sheet b. either cut out of sheet b or is produced of transparent material forming part of said sheet. By y displacement of the covering sheet b and the slide d relative to each other and displacement of the two .parts relative to the casingS which casing has a .transparent top, a triang'lez of variable size can be made visible on said top. The apex Ic of the triangle can be applied as a co-ordinate to any desired point of the top a. -One of the two movable parts d, b represents the abscissa values andthe other the ordinate values. By adjusting the relative position of members d and Vb the apex of the triangle can be made to point to a desired point of the topa. Conversely, by adjusting the apex of the triangle to coincide with a point of top a, the co-ordinates of this point can be read on the members d and b'. A map or any other original or primary pictorial representation may be translucently applied to top a.

Figs. 3 and 4 show an embodiment in which the covering sheet consists of a movable part` b1 and a stationary part b2. In this case an inclined colored strip Z extending clear across the ligure and across the path of movement of the parts is provided on slide member d and, on the movable part b1 of the covering sheet, a transparent strip m which is provided at an angle (e. g. to the colored strip Z and also extends clear across the figure and across the path of movement of the VThis triangle Vis parts and intersects strip l in all possible positions. A square is produced at the point of intersection n of the two strips l and m. The transparent cover sheet a is provided with a stationary, for example, printed cover b2 from which, for example, the outlines of the numbers of a system of numbers are cut out so as to Ibe transparent. The point of intersection of the strips l and m can be shifted to any desired portion of the stationary pictorial representation by displacing the cover b1 and the slide d. The trans-- parent portion of the cover b2, which lies above the point of intersection is underlaid by the co1- ored square appearing at the point of intersection so that the representation of the number or the like located at', this point is rendered visible.

In the embodiment of my invention according to Figs. 5 and 6, instead of the stationary cover` b2 of Fig. 4, there is provided a second movable cover b3 which lies above the cover b1. This cover b3 has transparent parts o of variousforms-e. g. circles, triangles and crosses. By making one of these parts o coincide with the square-shaped intersecting portion n of the colored stripl and of the transparent strip m, the representations of the corresponding parts o (circle, triangle or'cross) can be rendered visible successively.

According to Figure 7, instead of arranging the various representations all on one cover b3, only the representations (circle, triangle or cross) may Y be individually placed on individual sheets b4, b5, bs. In this case, the larger representations are cut out of the sheet overlaying the smaller representation.

The case can also occur that all the primary arrangements for the formation of a secondary composite representation are placed in the covers, and the slide forms an underlayer having a desired color. The covers themselves need not extend over the Whole of the sheets Which support them; these sheets may be transparent only in part. The function of the top parts as cover may be entirely dispensed with and they may form slides as the slides in slide rules holding primary arrangements for the formation of secondary representations.

The apparatus according to Fig. 8 has a transparent cover a carrying a primary or basic representation, two transparent slides d1 and d2 and-an opaque-e. g. White-underlayer or base p. The slides d1 and d2 each is provided with a colored stripe el, e2, which stripes are at an angle to each other. In this arrangement, the two colored stripes e1 and e2 and their intersecting point are visible through the cover a. Slide d2 may also be opaque and be of the color of the underlayer p, so that it serves as a base at the same time.

In the case of the examples hereinbefore described, the transparent portions in the covers may also be formed by suitable perforations.

I claim:

1. An apparatus for indicating points on a transparent representation, said apparatus comprising, in combination, a slide means adjacent to and being slideably displaceable with respect to said transparent representation, said slide means having a transparent area, another slide means adjacent to and being slideably displaceable with respect to said rst mentioned slide means and with respect to said transparent representation, said other slide means being provided with a not transparent representation, said not transparent representation together with the border line of said transparent area forming an indicating Hpoint, the position of said indicating point being changeable with respect to said transparent representation upon displacement of said slide means relative to said transparent representation.

2. An apparatus for indicating points on a transparent representation, said apparatus comprising, in combination, a slide means adjacent to and being slideably displaceable with respect to said transparent representation, said slide means having a triangularly shaped cut out, another slide means adjacent to and being slideably displaceable with respect to said first mentioned slide means and with respect to said transparent representation, said other slide means being provided With a not transparent triangle, the edge of said cut out intersecting with the border line of said triangle and forming an indicating point therewith, the position of said indicating point being changeable with respect to said transparent representation upon displacement of said slide means relative to said transparent representation.

3. An apparatus for indicating points on a transparent representation, said apparatus comprising, incombination, a slide means adjacent to and being slideably displaceable with respect to said transparent representation, said slide means having a transparent area, comprising an inclined border line, another slide means adjacent to and being slideably displaceable with respect to said first mentioned slide means and with respect to said transparent representation, said other slide means being provided With a not transparent representation, comprising a border line Which is oppositely inclined to said first mentioned border line, said border lines together forming an indicating point, the position of said indicating point being changeable with respect to said transparent representation upon displacement of said slide means relative to said transparent representation.

CHARLES BECKER. 

